If a Joomla update of Remository or UserPoints fails, and you visit the link shown by Joomla for downloading the software, you are likely to get this failure message. It is followed by more text. If the upgrade fails, attempting to download the link is also likely to fail. What the message is trying to tell you is that you must have a current subscription, and have entered your user token into Remository. The user token can be found on the profile page when you are logged in. It is stored by going to the Remository Options (in the admin interface). The user token is the first item in the options.